Poising and balancing tool



Aug. 8, 1950 w. E. BERLINCOURT I 2,517,330

POISING AND BALANCING TOOL Filed Oct. 6, 1947 INVENTOR azz/A-QKMMM invention.

knife edge blocksfl pivot bar.

from the main su porting" f Patented Aug. 8, 1950 This' invention to tools used in the making and repairing of instruments and particularly to poising and balancing tools.

One of the objects of the invention is to provide a poising and balancing tool'which' can be quickly set up forfiuse without the necessity of using levels and other adjusting mechanism.

A further'objectfis to'p'rovide a poising and balancing tool which self levellingjand ready for use onany commonfwork' bench.

A further object' is to'provide a poising and balancing tool which is" adaptable to a wide variety of uses withoutthe necessity of changing parts andadjustrnent of setting.

A further object islto'prpvide Ia Poising and balancing tool which'is' of sirnple and compact construction, cheap to manufacture andrequires little maintenance and upkeep;

These and other objects will be apparent from the specification and drawings, illustrating the Inthedrawings?v A Figure 1 is a perspectiveviewof the device. Figure 2is aperspectiveview "of one ofthe an equal number of turns disposed on either side Figure 4 is aperspect weighted ment screws. A 4 A Referring to the drawings the pivot ring in is provided with two drilled'holes ll, diametrically opposite each other. Thesefholes ll act as journal bearings for thepin I2Qwhich project AAI,A'3. I;,The"frame I3 may be of any convenientfdrm and requires nomeans for 'adjustingfor'level, the only repivot ring l0, diametricallyopposite each other and at right, angles toitheipins':TIZII'A'PFIhe pins H are pointed at l5 to provide; fine pivot bearing points and are preferablyl'hardened.

conical shaped holes 'ISa ata point midway of the length of the bar and on opposite sides. These holes IGa are of slightly widertaper than that on the ends of the pivot pins H in order to reduce to a minimum the friction of the pins l4 when adjusted to fit into the bearing holes [6a. A shaft I1 is fixedto the swing bar l6 midway of its length and at right angles thereto. A weighted sphere I8 is securely fixed to the lower end of AT'ES PATENT oFFlcEA;

" (b /2,517,830 I w A jfr orsme BAIlANCINdTooL I williani E. Berlinccurt, Montreal, Quebec, castes A fiitputationib aber a saw no 778,123 A claims. T. A A- .1

the shaft .11. rnesphjere It can be a ballAAbear A ing or such like article. and beof such mass,

consideringthe weight-and dispositionof the jother parts of the mechanism, as to'; hold the the 'bar IBbut prevent the blocks from rotating thereon. Adjustment bars A 22 are fixed. in the blocks 20,vone to each block. .The adjustment bar 2201 one block is guidedin the aperture23 of the opposit block, the ends of the bars ,be-

ingthreaded at 24 to take the adjusting nuts 25.

A spring 26 fits around the swing bar IGwith of the shaft [1. Alternatively, two springs of equal capacitycan befitted, one on either side fof theshaft, H. The outer ends of the spring 26 seat in'the counterbores .28 of. the blocks 20, jwhich, together with the recessed face 30 of the .blocks, allows the main faces of the blocksto come together when soadjusted by, the adjusting bars 22 and adjusting nuts 25 A The top ends of the blocks '20 are tapered "to provide a knife edge at 2'1. These edgesare machined accurately parallel and at right angles ;to the shaft I1 carrying the spherical weight I8, The edges 21 are preferably hardened. i The blocks 20 arecut away on either side at :29 to givemaximum clearance for the ring lllin extreme displaced positions of the mechanism. In the operation of thisinvention, the support frame I3 isof suitable design and weightAto hold fthe mechanism stable under] all working;conditions. .The pivot pins I2 supported by thefra me j l3 need only be reasonably level asthe device itself will seekits own level. As, the weightedassemblyof the blocks 20 is pivoted on the pins. Ill and the ring In is pivoted on the pins 12, thedeviceistherefore free to swing in any direction W th h m t qiAcl ar e iQr-A T e spherical Qweight AI 8 is 1 sufliciently heavy as to hold theblocks 20 and therefore their knife edges efi'ect equal movement of the blocks re1ative,- to the centre of gravity of the device through the weight l8.

While the work to be balanced isbeing placed on the knife edges of the device, a slight degree of movement may take place, but this-movement is quickly stabilized as soon as the handis re- 4 bar, each of said blocks having knife edges at the top, parallel with each other and held level by said suspended weight, means to adjust said blocks on the swing bar relative to each other, spring means holding said blocks apart against said adjusting means, a pivot ring, pivot pins projecting inwardly from said ring to support said swing bar, and pivot means supporting said pivot ring tat'yright angles"t0 the-"pivot pins supporting the swing bar;

, 2. In a poising and balancing tool, a swing bar,

. a weight rigidly suspended from said swing bar, a

pair oiblocksslidably mounted on said swing bar one on either side of the support point of said ;weighksaidhlocks:being recessed on their inward faces to allowthern to contact each other above the swing bar and having knife edges at the top,

moved. Any such movement can be eliminated by reasonably, skilled operatorsl I Due to the fact that the faces of the blocks 2 3 can .be' adiusted totouchfeach other by having the springiends "seated in the counterbores 28,, it

;is..'.possib1e to useithis device as a vise for particular forms of work, thereby greatlyincreasing its usefulness.

In Figure 4 of the drawings, the weightlS is shown fiattenedat 3.1;; By using such a flattened level, it ..is,possible to use the device without the ringl0,and the base. [3, as the weight ,alone would hold the device ,steady and level. Again, itis possible to use the device without the base ';l 3 as shown in Figure 1, and substitute there- .iore ,a'staking toolas commonly used in instru- *ment repair;*, The pins of thestakingtoolsub- 'stituting for the pins l2. '.,;Generally, in the repair and maintenance of 'Weight.and where the work bench is particularly instruments? particularly where ther is a large headingof major repairs; This has been found to be due mainly to the time taken in settling 'unand levellingthe devices hitherto in use for this class of work. .;,This is particularly the case where a large variety of types and sizes, are involved, in addition to thejhigh first costof such devices; This'condition has been found to be particularly true in the watch repair industry, where" a large: volume ofwork has to be done within a limitedtime and relatively, low cost is 'anre'ssentia'h The devic s hereindescribed providesthe operator with a sturdy, cheap and 'efiicient" device of relatively nonprecision ,manu i facture, which,can be; adjusted to take various sized elements in; a minimum of time and effort. While a particular form of the devicehas been described and illustrated, it'will be readily seen that the various elements making up the. device could be changed in form and design without departingirom' the scopezof the invention.

What I claim is: r g V {1 In a poising and balancing tool; aiswing bar, a-weight rigidlysuspended from said swing bar, a pair of-blocksslidably mounted on saidv swing parallekwith each other and held level by said suspended weight, a pivot ring, .pivot pins proiecting inwardly irom saidring .tcsupportsaid 7 swing banana pivptmeans' supporting. said pivo ring'at right anglesto thepivot pins supporting th swing loar.v

' wIn aizoi ingandbalancing toolra swing bar,

' a weightrigidly,suepelidedfrom saidhswing bar,

a pair of ,bloc ssljgdably mounted onqsaid swing bar one.oneithetsidaoithe suppert pointof said Vw ight,.saidblocks-being recessed on their inward f ces to llow,.themltocnntact.each Qtherabove the swing bar andhaying knife edges. at the top, parallel, with each,..other.=and-.he1d. level by said suspendedlweightl Springdrneans holdin said blocks p m aiisto adjust thepos'ition vof. said blocks on the swing bar, relative to. each'other against. he pressure. otsflid spring .means,- a pivot r na. pivot Q pins projecting inwardl from said ring a to support said swing ,bar, and pivot. m n suppoi tingusaidpivot ring at right anglesto the pivot pins 'suppOrtingthesWing bar.

"4. Ina poising and balancing tool, a swing bar, a weight rigidly suspended from saidtswing bar, a pai of blocks,slidablyimounted. on aid swing ar-one oneith'er side pi the support Po n Of said weight; said blocks'being recessed ontheir inward faces to allow. them. o. contact-each other above the 'swing'bar "andhaving knife edges at 3, 01 paralle wwithleach. OtherHand held level by said suspended weight, spring means holding said blocks apart,.,rrieans to adjust the position of said blocks on the'swir'ig bar relative -to'each other equally On either, side of, the. centre of gravity against the pressure of. said springmeans, a pivot ring, pivot pinsprojecting inwardly, from said jring to su port said swin bar,. and pivot means supporting'said pivot ring at right angles o the,pvotpinsfsupporting. the Swing, bar.

' r ."WJ LI AM ,BERLINCOURTJ :REF nENcEs-cimn pmrnneTATns PATENTS 

